(HJ 551-2016 replaced HJ 551-2009 2016-08-01 implementation)
This standard is formulated to implement the "Environmental Protection Law of the People's Republic of China" and the "Law of the People's Republic of China on Water Pollution Control", protect the environment, protect human health, and standardize the determination methods of chlorine dioxide and chlorite in wastewater. This standard specifies the continuous titration iodine method for the determination of chlorine dioxide and chlorite in textile dyeing and finishing industrial wastewater. This standard is an amendment to the Iodometric Method for the Determination of Chlorine Dioxide in Water (Interim) (HJ 551-2009). This standard was first published in 2009. The original drafting unit was Beijing Environmental Protection Monitoring Center.
Water quality--Determination of chlorine dioxide and chlorite--Continuous titration with iodometric method (HJ 551-2016 instead of HJ 551-2009)